Anchorage device.



UNITED STATES PATENT OFFICE.

JOHN FRANCIS BOORAEIM, 0F GREENYVICH, CONNECTICUT, AND GABRIEL E. ROHMER; OF WOODSIDE, NEW YORK, ASSIGNORS, BY MESNE ASSIGNMENTS, TO CINCH EX. PANSION BOLT & ENGINEERING COMPANY, 0F NEW YORK, N. Y., A CORPORATION OF NEW YORK.

ANCHORAGE DEVICE.

Specication of Letters Patent.

Patented Dee. 8, i914.

Application filed March 10, 1911. Serial No. 613,627.

T0 all whom it may concern Be it known that we, JOHN FRANCis Boon/um, a citizen of the United States of America, and residing in Greenwich, in the county of' Fairfield and State of Connectiout, and GAnnnri. E. Roraima, a citizen of the United States of America, and residing in l/Voodside, in the county of Queens and State of New York, have invented certain new and useful Improvements in Anchorage Devices, of which the following is a specification.

This invention relates to anchorage devices and has for its object to provide an improved means of anchorage.

The invention is shown in the accompanying drawing and will be more fully described hereinafter, and finally pointed i out in the claims.

In the accompanying drawing, Figures 1 to 8 show vertical, longitudinal sections partly in elevation of embodiments of our improved device, in which Fig. l shows the expansible member arranged with ay tapering bore, Fig. 2 shows the expansible member with a cylindrical bore, Fig. 3 shows one expanding member screw-threaded to a stud bolt, and the expansible member with a cylindrical untlireaded interior and rounded exterior, the other expanding member iitting unthreaded on the bolt, Fig. -i also shows an expanding member screw-threaded to a stud bolt with an expansible member having a tapering bore, Fig. 5 shows an expansihle member having a rectangular shape in longitudinal section, Fig. (3 shows an expansible member having a rectangular shape in longitudinal section, and a tapering bore at its interior with one expanding member screw-threaded on the stud bolt, Fig. 7 shows the expansible ymember shown in Fig. l divided into two parts meeting back to back, having a rounded exterior and a tapering bore. Fig. 8 shows a. similar arrangement with an expansible member arranged to have an exterior rectangular shape in longitudinal section, with a tapering b re interior, and Fig. 9 shows one form of our device as applied to a hole of concrete or similar material.

Similar letters of reference indicate corresponding parrs throughout the several figures of the drawings.

Referring to the drawings, the eXpansible member 10 rits loosely on the bolt 20 which is screw-threaded and which has a head 29 at one end. Meshing with the screw-threads on the bolt Q0 are nuts and 36, the nut 35 acting as a check because it is at the end of the thread on. the bolt, which nut may be replaced by any other abutment or by the work to be anchored. The other nut 36 on the continued turning of the threaded end of thev bolt advances on the same. Intermediate the nuts 35 and 36 of the embodiment shown in the drawings, expanding cone-shaped members 15 and 16 are 'arranged. which have an interior bore of substantiallv the same diameter as the diameter of the bolt. straight part terminating in a fillet 18 behind whieh a cylindrical collar 181 is arranged. In the embodiment shown in the drawings, the exterior is shaped longitudinali;7 to a curve of substantially the shape of a eatenary. One end of the expanding member has diameter slightly larger than that of the bolt, while the other end has a diameter substantially equal to or somewhat smaller than the hole into which it is to be used. A Parts of the expanding cone-shaped members and 16 rest against nuts 35 and 36.

Inter iediate the expanding members 15 and i6 wiriehare of relatively hard material, as malleable or Cast iron or steel. an expansihle member 10 is arranged, which is of soft lead or alloy. or other suitable material. which is Semi-plastic under pressure., so as to be expansible and capable of .molding. ln Fig. 1. this member 1) is provided with a tapering bore 11 and has a rounded perin'ieter 1'11. i

1n the form shown in Z the expansible nieuwer is provided with a cylindrical interior and a curved exterior.

in Fig. il, the expanding member l5 is shown screw-threadcd so as to engage the .stud bolt 20. and the expansible member is shown with a cylindrical interior and a curved exteiorA i ln Fig. 4 one expanding member 15 is shown screw-threaded and the 'expansible member shown with a tapering bore as at l?. and with a curved off exterior as at 29., while the following nut is shown by 30.

The exterior is shaped with a lOO ln Fig. 5, the expanding; member is shown in longitudinal section with an exterior Wall 23 and an interior Wall 24, the expanding members 15 and 16 engaging the interior of the expansible member l0.

in Fig. 6, the expansible member is shown in longitudinal section with an exA terior wail and with a tapering bore 25, the expanding member l being screw threaded to co-act with the stud bolt.

In Fig. '7, the expansible member is divided into two parts and 102 which have their backs 271 and :272 face to face, having rounded ofi' ends 281 and 282, and similarly, in Fig. 8 the expansible member is shown in two parts 101 and 102 with exterior surfaces 291 and 292 at the free ends and their parts Q71 and 272 back to back. In Fig. 7, the expansible member has a taper" ing bore and a rounded interior and in Fig. 8 the expansible member is shown with a tapering bore.

The expansible member may have various cross sections, one of which may be rectanguiar.

The operation of our improved device is as follows: With the parts in the position shown in Fig. 1f, and the expanding members facingr each other, and the expansible member 10 therebetween, or back to back as shown in Fig. 7, the bolt is turned, the

nut 35 being prevented. from turning by suitable means, a wrench, whereupon the The exterior of the expansible member contacting With the Walls of the hole forming a sur'iace contact throughout its circumference and length, represents a very large area of contact in intimate relation under continuous pressure, which is maintained by the position of the expanding members, so that in effect, the bolt, expanding;r members, expansible members, and Walls of the hole, act as if they were one uniform, homogeneous mass.

Reference is hereby made to our co-pending application filed by us on April 24, 1911, Serial No. 623,073, in which a method described and claimed, Whereas the structure is described and claimed in this application, the said method consisting in expandino and molding an expansible member under complete restraint, so that all the expanding material is forced into the intersticcs of the Walls of the hole and against said walls, Without leakage, and the expansi.

ble member is anchored to the said walls, which is claimed in that application but is not claimed herein.

We have shown several embodiments of our invention, but we do not wish to be limited to thc specific forms thereof, since changes within the scope of the appended claims may be made therein, Without departing from the spirit and underlying principles of our invention.

rHaving thus described our invention, We

expanding members are brought towarlclaim as new and desire to secure by Leteach other until they enter each free end of the. expansible member. The turning of the bolt is continued and thereby the free ends of each expansible member are forced radially outwardly and Simultaneously longitudinally toward the center of the eX- pansible member. By this the exterior peripheral surface of the expansible member is brought, throughout its surface into intimate contact With .the walls of the hole, filling all interstices of the material shown at 3l 'in .Eig 9. The turning is continued until alllavailable space between the operative surf of the expanding members and the Walls: of the hole are so iilled that no further relative motion of the expanding' members or bolt can take place, illeted flange 18 which is substantially the diameter of the hole, acting as a Stop to the flow of the mass ofmaterial of which the expansible member; isycom posed. The mass of the expansibleniember by a further slight turningr is compactly compressed between the expanding members and the walls of the holes and finding complete resistance against the eimanding,lr members With the lleted flanges is forced back against the Walls oi the holes and to the threaded bolt .if any space exists between the inner ends of the expanding members.

ters Patent:

1. In an expansion bolt, the combination of a bolt, an expansible member capable of being molded under pressure, an expanding member at each end of the expansible member, and a collar at the outer end of each of the expanding members and of larger diameter than the expanding members.

2. In an expansion bolt, the combination of a bolt, an expansible member capable of being molded under pressure, an expanding member at each end of the expansible memberthe contacting surfaces of the expanding and expansible members having different inclinations with respect to the axes of the bolt, said expanding members being adapted to act consecutively on different portions of the expansible member, whereby the entire force causing expansion is successively concentrated upon consecutive portions of the expansible member, and a collar at the outer end of each of the expanding members and of larger diameter :than the expanding members. i'

3. ln an expansion bolt, the combination of an expansible member of a material capable of being molded and mount-ed on said bolt, seid expansible member having an outer surface of varying distance frolii the periphery of the bolt, and` members for*vk eX- pending said expansible member, entering both ends thereof, the diameter of the en terin ends of said members being equal to the diameter of the entered ends ef said expansible member.

4. In an expansion belt, the eembination of a bolt proper, an expansible member of a material capable of being molded and mounted on said bolt proper, said expansible member having an outer surface of varying distance from the periphery of the boit pro er, expanding members entering each en of the expansble member and being adapted to act censecutively on d portions of the expansible member, whereby the entire force causing expansien is concentrated on consecutive portions of the expansible member, and a collar at the outer end of each of the expanding members and of larger diameter than the expanding members, the volume of the expansible member betv'veen the expanding members and the collars being such as to cause the expanst ble member to be forced outwardly against the walls of the hole as the expanding mem bers enter the ends thereof.

5. The combination of an expansible member of semilplastie materieleapable ofbeing molded, and an expanding member of rela tively hard material, engaging `the expansible member, and having a illei-ed flange at i'ferent' gm o ite end awayr from thatv end engaging the;

expansible member.

6. The combination of an expansible membei; of semi-plastic material capable of be-l ing molded, and 'an expanding member for engagi the same, said expanding member being a ed longitudinally like a catenary curve, ang formed of a straight part terminating in a fillet, and a cylindrical collar arranged at that end of the expanding member opposite to that end engaging the expansible member.

7. In an expansion bolt, the combination of a bolt, expanding members thereon, each having a beveled end and having these beveled ends facing each other andvan. e1:-y

ansible member oi a material capable of eing molded under pressure, aving a bore at each end thereof engaged by the beveled end of the expanding members, the diameter of the bore being equal to the diameter of the entering end of the expanding member.

In testimony, that we claimthe foregoing our invention, We have signed our names in presence of two subscribing Witnesses.

J. FRANCIS BOORAEM. GABRIFL E. RHMER.

Witnesses z JAMES T. l' ,an, JACOB Fni'nmmn. 

